/Engine/Source/Editor/PropertyEditor/Public/IDetailChildrenBuilder.h
Adds a set of objects to as a child. Similar to details panels, all objects will be visible in the details panel as set of properties from the common base class from the list of objects
The header row generated for this set of objects by the details panel
[IDetailPropertyRow](API\Editor\PropertyEditor\IDetailPropertyRow) * AddExternalObjects ( const [TArray](API\Runtime\Core\Containers\TArray)< [UObject](API\Runtime\CoreUObject\UObject\UObject) * > & Objects, const [FAddPropertyParams](API\Editor\PropertyEditor\FAddPropertyParams) & Params )